is Ereshkigal a Last One?

I unlocked the Ultimate Lair and defeated every Last One in it with the exception to Ereshkigal.
Now i still had a few hours before the final battle so i figured iu head back to the Oasis Lighthouse and submit my completion of "Last One Standing" now that i had killed every Last One without having to deal with hunting them down myself.
I confirmed in the Bestiary that all the monsters were extinct with the exception to some and made sure to tavel each floor one by one to ensure they were all cleared but i couldn't complete the quest. so i am wondering is if Ereshkigal counts as a Last One, if not then what am i missing?
Best Answer
emmm . . .
you still need to kill 3 more monster in the final day
Chimera,Sugriva and Arcangeli.
No, Ereshkigal nor Aeronite is count as a last one.
to complete "Last One Standing" quest , you have to beat Bhunivelze to unlock NG+, and head straight back to Lighthouse as soon as you can to report it.
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Is Ereshkigal dead?
Definition. Ereshkigal (also known as Irkalla and Allatu) is the Mesopotamian Queen of the Dead who rules the underworld. Her name translates as 'Queen of the Great Below' or 'Lady of the Great Place.Are Ereshkigal and Ishtar the same?
Ereshkigal is the older sister (more properly the aunt) of Ishtar, the goddess of life and fertility. In this sense, she is also her counterpart, the goddess of death and also the symbol of nature during the non-productive season of the year.Who married Ereshkigal?
Ereshkigal is listed alongside other underworld deities. Nergal is described as her husband in this text.Calm Down Ereshkigal... | Fate/Grand Carnival S2 English Subbed
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